The invention provides a fault-tolerant control method and device for a three-phase motor, and the method and device are used for a drive circuit composed of the three-phase motor and a corresponding three-phase inverter bridge, and a bridge arm of a certain phase in the three-phase inverter bridge has an open-circuit fault or a certain phase in the three-phase motor has an open-circuit fault. The fault-tolerant control method comprises the following steps: acquiring three-phase current in the driving circuit, and converting the three-phase current into d-axis current and q-axis current; acquiring a torque command value, and solving a phase current reference value according to the torque command value, the d-axis current and the q-axis current; and generating a duty ratio based on the phase current reference value and the actual current value of the corresponding phase, and outputting a corresponding PWM signal to a driving circuit based on the duty ratio to realize fault-tolerant control.
本发明提供了一种三相电机的容错控制方法及装置,用于由三相电机和对应的三相逆变桥构成的驱动电路,其中三相逆变桥中某一相的桥臂发生断路故障或三相电机中的某一相发生开路故障,使得驱动电路中剩余大小相等、方向相反的两相电流,容错控制方法包括:获取驱动电路中的三相电流,将三相电流转换为d轴电流和q轴电流;获取转矩命令值,根据转矩命令值和d轴电流和q轴电流求解相电流参考值;以及基于相电流参考值和对应相的实际电流值生成占空比,基于占空比输出相应的PWM信号至驱动电路以实现容错控制。
Fault-tolerant control method and device for three-phase motor
一种三相电机的容错控制方法及装置
2023-06-13
Patent
Electronic Resource
Chinese
IPC: | H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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